The wonderfully sharp radioactive lens. The radioactive thorium in the glass decays to give a warm yellow tone to the images (if you turn off AWB). The glass can be returned to neutral by exposing it to UV light, apparently, but I like the warm tones.

The wonderfully sharp radioactive lens. The radioactive thorium in the glass decays to give a warm yellow tone to the images (if you turn off AWB). The glass can be returned to neutral by exposing it to UV light, apparently, but I like the warm tones.

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Very nice. A few days I saw the video below on youtube, showing that the yellowing disappears by exposing it to a € 10 Ikea LED lamp. I'm gonna try that someday, the yellow tones in the pictures are too much for my taste.

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